SHINDO3

Juntendo University Nerima Hospital

Patients~50people

POSSIBLE LEAKHealth / medical / treatment / Date of birthLoss · Investigating

Open in the live monitor ▶
Disclosed
Jan 30, 2026
Detected
Jan 7, 2026
Detection to disclosure
23 days
Leak
Leak possible
Type
Loss
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityName, Date of birth, Photos of surgical sites (image)
Account dataPatient ID
Special-care dataSurgical procedure

How many

  • Patients ~50 people

Who is affected

  • Patients

Cause

A doctor's personal PC went missing, most likely inside the hospital

Timeline

  1. Detected
  2. Reported to authority
  3. Reported to MEXT and the Tokyo Metropolitan Government
  4. First disclosure

Response

  • Notified individuals

Plans to explain and apologize to the patients

What you should do

  1. Health data can't be taken back. Don't answer blackmail; call the police (#9110) or the consumer hotline (188)
  2. Check the company's notice to see if you're affected

Lessons for companies

  1. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  2. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources